Air-compressor and the like.



No. 821,299. PATENTED MAY 22, 1906. A. J. LAVOIE.

AIR COMPRESSOR AND THE LIKE.

APPLICATION FILED MAR.2, 1905.

2 SHEETS-SHEET 1.

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PATENTED MAY 22, 1906.

A. J. LAVOIE.

AIR COMPRESSOR AND THE LIKE.

APPLICATION FILED MAR. 2. 1905.

2 SHEETSSHBBT 2.

lnrenlor.

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

.zatented May 22, 1906.

Application filed March 2, 1905. Serial No. 248,075.

T0 at whom it may concern.-

Be it known that I, ALPHoNsE JosEPH LA- VOIE, of the city of Toronto, in the county of York, Province of Ontario, Canada, have invented certain new and useful Improvements in Air-Compressors and the Like; and I do hereby declare that the following is a full, clear, and exact description of the same.

This invention consists, essentially, of a cylinder having annularly-arranged ports thereinto and a piston operating therein and a head having lugs arranged concentrically With said annularly-arranged ports, said lugs forming bearings centrally disposed in relation to said ports, and annular double-flanged valves supported insaid bearings and closing said ports.

The objects of the invention are to reduce to a minimum the number of valves necessary in the operation of a compressing-machine and to devise a durable construction which shall be cheap to manufacture and whereby high efliciency is attained.

In the drawings, Figure 1 is a longitudinal section of the cylinder of a compressing-machine, showing the arrangement of the ports and valves in the heads in accordance with the invention. Fig. 2 is a vertical cross-section through the line 2 2 in Fig. 1. Fig. 3 is a vertical cross-section through the line 3 3 in Fig. 1. Fig. 4 is an enlarged sectional view of the minor portion of the cylinderhead, partially broken away and showing the inlet-valve in position to be removed. Fig.

'5 is an enlarged sectional view through the line 3 3, Fig. 1, looking toward the cylinder, the head and outlet-valve being partially broken away to show the outlet-port in the cylinder and located underneath the valve. Fig. 6 is a sectional view of the inlet-valve, showing the means for retaining said valve in position. Fig. 7 is a sectional view of a form of inlet-valve preferable in some constructions. Fig. 8 is a sectional view of the outlet-valve.

Like letters of reference indicate corresponding parts in each figure.

Referring to the drawings, A is a cylinder, and B the piston operating therein.

A is a cylinder, having at the ends thereof the ring formations d, sup orted from the casing of the cylinder by t e bridges d and forming between said casing and rings the annularly-arranged outlet-ports G.

a is a casing surrounding the cylinder A and forming with the said cylinder-casing a water-chamber, having the ports I) and c, to which suitable connections may be made from the water-supply.

C is a casing, preferably forming part with the casing a and covering the passage O above the said casing a and having the out let-opening O through the top thereof.

D is a casing, .preferably forming part of the casing a and covering the passage D be neath the lower side of the casing a and having the inlet-opening D therethrough.

E and F are heads correspondingly formed to meet the casing surrounding the cylinder A and firmly secured thereto and packed.

6 represents chambers in the heads E and F, registering with each open end'of the passage D, leading to the inlet-opening D, and

are designed to carry the air to the inlet-port entering into cylinder.

f represents chambers in the heads E and F, registering with the open ends of the passage O, leading to the outlet-port C, and are designed to carry the air under compression from the outlet-port G to the outlet-passage O.

H represents annular partitions in the heads E and F, having the openings h, communicating with the chambers e and inwardly-turned flanges h to form a free'communication between the inlet-passage and the inlet-ports.

H represents vertically-disposed partitions forming part of the annular partitions H and serve to separate the chambers e from the chambers f in the heads E and F.

I represents bosses centrally disposed in the openings at the ends of the cylinder A and forming, with the flanges 71/ of the partitions II, the annular port 'i, leading into the cylinder A, the said bosses and flanges h having surfaceiinished faces toward the edges thereof to form valve-seats. The communication from the inlet-opening D to the cylinder A is thus establishednamely, through the passage D and into the chambers 6 through the openings h and the ports 11.

j and 7c are lugs extending inwardly and outwardly from the partitions H and the bosses I, respectively, and arranged in pairs set diametrically opposite one to the other and forming bearings centrally disposed in relation to the annular ports 1' and concentric therewith.

J represents double-flanged annular valves having the stems j extending through the ports t and the bearings formed by the lugs i and 7c and having the inner faces of the flanges surface-finished to meet the valve-seats of the annular post i.

n represents stoplugs extending laterally 5 from the outer extremities of the stem j and form stops to limit the travel of the valves inwardly by engagement with the lugs and 7c. The valves J are spring-held to their seats by spiral springs P, which are seatxo ed in the recesses M, formed in the ribs N of the boss I. The pins K are inserted through the openings L in the partition H and are screwed into suitable threaded orifices in the valve-stems j, and the recesses l I are sealed with suitable plugs 29.

K represents adj usting-nuts secured on the heads of the pins K for relieving or increasing the tension of the spiral springs P.

Y Q and q are lugs integral with the heads, which form annular bearings centrally disposed in relation to the outlet-ports G.

Rrepresents double-flanged annular valves having the stems r sliding in the bearings formed by the lugs Q and q, and the surface 2 5 finished faces S meet the surface faces surrounding the ports G and forming the valveseats.

T represents small coil-springs placed in re cesses in the heads behind the stems r of the valves R and serve to force the valves down upon their seats independent of the pressure acting behind them.

B is a piston operating in cylinder A, the rod therefor extending through the. headE 3 5 and suitably packed in the boss of said head.

In the operation of this machine the air enters through the port D and passes through alle passage D to the chambers e in the heads.

, From there it passes through the openings h in the partition H and through the inlet-port i into the cylinder A, the valve J being lifted from its seat by the pressure of the air. The inward travel of the valve J is limited by stop-lugs n, which come in contact with the lugs and 7c in the head. The air in the opforces the valve J down on its seat, thereby securely closing the port 0). The air then passes through the annularly-arranged ports G, lifting the valve R from its seat and, traveling through the chamber passes into the passage O. and outlet-port (j It will be seen that by a construction such as described a form of valve very simple, du- 5 5' rable, and of high efficiency is produced.

The strain of the pounding of the inlet-valve is taken entirely upon the stoplugs, which are an integral part of the valve, and makes it impossible for the said valve to be drawn into the cylinder.

The pins K serve to hold the valve from turning and form, with the springs, the means for returning the valve to its seat independent of the pressure.

To place the inlet-valve in position, the

posite end of the cylinder being compressed stop-lugs n are inserted through the inlet-port i, as shown in Fig. 4. The valve is then turned to bring the st0p-lugs n behind the stop-lugs and 7c in the head. The guidepins are then passed through the openings L from the back of the head and screwed into the valve, the springs P and lock-nuts being then placed in position.

In an air-compressor such as described it will be readily understood by those skilled in the art that the cost of production is reduced to a minimum, the multiplicity of valves is done away, with and the machine-work necessary is very simple. The end of the cylinder is faced, the portion surrounding the outlet-port being surfaced to form aseat for the outlet-valve. All the machinery required on the head is done in one setting, it being only necessary to face the bearing-lugs and the front faces of the heads, the portion surrounding the inlet-ports being surfaced. to form seats for the inlet-valves.

The valves are annular rings and are finished in the lathe.

It will also be seen that by the form of cylinder, cylinder heads, and valves such as described the air may be taken from the upper chamber O equally as well as from the chamber D. The cylinder ends and heads being symmetrical vertically and horizontally, it is merely necessary to invert the heads to change the course of the air. I

In Fig. 7 a form of valve is shown which is used on machines of a smaller type which will not allow the space necessary for the inner stop-lugs. the cylindrical surface of the center boss and to be guided thereon. The outer lugs serve to effectually prevent the valve from entering the cylinder.

While showing and describing a machine constructed to operate the valves at the ends of the cylinder, it will be understood that valves of the form described might readily be adapted to a machine of the piston-inlet t e.

ilVhat I claim as my invention is 1. In a device of the class described, in combination, a cylinder having an open end, an annularly-arranged outlet-port, a waterjacket surrounding said cylinder, and inlet and outlet passages at opposite sides of said Water-jacket, said jacket having ingress and egress ports, a head, having a centrally-disposed boss closing said open end, an annular partition surrounding and forming with said boss an annular inlet-port to said cylinder, a vertically-disposed partition forming with the annular partition-chambers to register with said passages, and annular inlet and outlet valves mounted in said head as and for the purpose specified.

2. In a device of the class described, in combination, a cylinder having an open end and an annularly-arranged outlet-port, a

This valve is designed to fit water-jacket surrounding said cylinder, inlet and outlet passages at opposite sides of said water-jacket, said jacket having ingress and egress ports, a head, having a centrally-disposed boss, an annular partition surrounding said boss and forming an annular port therewith, openings in said annular partition and chambers in communication with the 0 en end of the cylinder, and annular va ves mounted in said head and designed to open and close said inlet and outlet ports as and for the purpose specified.

3. In a device of the class described, in combination, an open-end cylinder having an annularly-arranged outlet-port, a waterjacket surrounding said cylinder, inlet and outlet passages at opposite sides of said water-jacket, and a piston mounted in said cylinder, a head, having a centrally-disposed boss, an annular partition surrounding said boss and forming an annular port into said cylinder, stop-lugs extending outwardly and inwardly from said boss and partition respectively and forming bearings centrally disposed in relation to said port, a doubleflanged valve supported in said bearings and closing said port, stop-lugs on said valve, lugs extending outwardly from said annular partition, similar lugs on the cylinder-head arranged to form with said lugs bearings centrally arranged in relation to said cylinder outlet-port, and a double-flanged valve guided in said bearings and designed to close said outlet-port as and for the purpose specified.

4. In a device of the class described, in combination, an open-end cylinder having annular outlet-ports, a water-jacket, inlet and outlet passages on opposite sides of said water-jacket and a piston mounted in said cylinder, a head, having a centrally-disposed boss, an annular partition surrounding said boss and forming an annular port into said cylinder, stop-lugs extending outwardly and inwardly from said boss and partition respectively and forming bearings centrally disposed in relation to said port, a doubleflanged valve supported in said bearings and closing said port, stop-lugs on said valve, pins forming guides for the valve, recesses in said head, springs in said recesses, nuts on said pins, lugs extending outwardly from the annular partition, lugs extending laterally in radial relation with saidlugs and forming therewith bearings centrally disposed in relation to said cylinder outlet-port, a double-flanged valve guided in said bearings, and springs located behind said valve, said valve being designed to close said outletport as and for the purpose specified.

5. In a device of the class described the combination with a cylinder, having an open end, of an annular outlet-port, radially-arranged inlet and outlet passages and a head inclosing said passages and cylinder proper and having an annular inlet-port and communicating passages thereto, of a double-flanged inlet-valve having stop-lugs and designed to close said inlet-port, and a double-flanged outlet-valve designed to close said outletport as and for the purpose specified.

Signed at Toronto, in the county of York, Province of Ontario, Canada, this 23d day of February, 1905.

ALPHONSE JOSEPH LAVOIE.

Witnesses:

H. DENNISON, E. WILKIN. 

